In reply to jcw:
In answer to JCW > Dropbox is your solution.
Files are still stored on your PC, but synced to 'the cloud' which means you save your document on your home PC as normal. ..... open laptop, hey presto the updated document is sitting there on your laptops hard drive (after a couple of seconds of syncing , and presuming you have internet access).
As someone who used to use multiple USB drives / email to myself / external hard drives in order to do what you are doing, dropbox has made me about a million times more efficient.
I have two desktop PC's (home and office), laptop and smart phone - all have the most up to date documents for everything I'm working on, all at the same time - and for me that is the main benefit.
As per one of the posts above, I think one can take the security issue too far - sending important legal documents in the post is second nature, but really it's about the least secure thing you can do. I know, as in a previous life I was a postman.
It's a numbers game, and I'm not Jennifer Lawrence so rely on being pretty low down on the pecking order of people wanting to hack my account to see my bits. And the numbers are mind boggling when it comes to the amount of data stored. As are my bits.